I am here to ask a question on behalf of my girlfriend.Two weeks back we made love.. There was lot of nipple play like sucking/biting/pinching and we both enjoyed it. By end of that particular day she had burning sensation in her nipple .Now today her skin on the nipple has peeled off.She is crying in pain now. I am feeling so guilty and bad.. Please help me as soon as possible.. Sorry for the bad English..and thanks in advance.